Parts for your 2020 Subaru Outback-Universal joints

2020 Subaru Outback universal joints (propeller shaft)

Based on technical references — including the Subaru Factory Service Manual for the 2020 Outback (Drive/Propeller Shaft section), the Subaru Electronic Parts Catalogue listing for the Propeller Shaft Assembly, and dealer-level service literature — the 2020 Subaru Outback’s symmetrical AWD driveline uses a two‑piece propeller shaft with universal joints (U‑joints) and a centre support bearing. The U‑joints are typically non‑serviceable (staked) items supplied as part of the complete prop shaft assembly. Wheel-end half‑shafts use constant velocity (CV) joints, but the propeller shaft relies on universal joints. So yes, universaljoints are absolutely relevant and fitted to the 2020 Subaru Outback.

On this Outback, the universal joints sit at each end of the propeller shaft, allowing smooth torque transfer from the transmission to the rear differential while accommodating driveline angles and body movement. Their whole job is to keep things rotating true and quiet while the suspension does its thing — no fuss, just reliable, continuous drive to the back wheels.

Because the OE universal joints are sealed and generally not greaseable, routine “maintenance” is really about inspection. As part of regular servicing, it’s smart to check for play at the prop shaft flanges, look for red rust dust or dried grease at the caps, and note any vibration or clunks on a road test. The Subaru service information flags that if a U‑joint is worn, the proper fix is to replace the propeller shaft assembly rather than pressing in new joints.

When replacement is needed, a workshop should:

• Mark the flanges to preserve phasing and orientation before removal.
• Use new self‑locking hardware where specified by the Subaru manual, and torque to spec.
• Inspect the centre support bearing and rubber mount at the same time, replace if noisy or cracked.
• Road test for driveline shudder or humming under load after fitment.

Typical signs a 2020 Outback universal joint is on the way out include a light squeak at low speed, a clunk when shifting from reverse to drive, or a rhythmic vibration that picks up above 60–80 km/h. If any of that shows up, it’s worth getting a technician to check prop shaft play and the centre bearing. There’s no fixed replacement interval in the factory literature — in Aussie and Kiwi conditions, a quick look every service (or 10,000–15,000 km) keeps things sweet. If towing, driving on corrugations, or heading off‑road, those inspections matter even more. Genuine or quality reman shafts keep the Outback’s AWD feel planted, quiet, and ready for the next long weekend.

Does the 2020 Subaru Outback have universal joints or just CV joints?

It has both. The front and rear drive axles use CV joints, while the propeller shaft running down the centre of the car uses universal joints. On most 2020 models, those U‑joints are non‑serviceable and supplied with the prop shaft assembly.

How often should the universal joints be checked or replaced?

There’s no set replacement interval in Subaru’s service info. Have them inspected at routine services (around every 10,000–15,000 km or annually). Replace the prop shaft assembly if there’s play, rust bleed at the caps, binding, or vibration that traces back to a U‑joint.

What are the symptoms of a failing universal joint on a 2020 Outback?

Common signs include a light squeak at low speeds, a clunk when selecting drive or reverse, and a steady vibration that builds with road speed. You might also feel a shudder on take‑off. A technician will confirm by checking for looseness at the flanges and assessing the centre support bearing.